Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin
The Sichuan Basin represents the earliest area where natural gas is explored, developed and comprehensively utilized in China. After over 50 years of oil and gas exploration, oil and gas reservoirs have been discovered in 24 gas-dominant layers in this basin. For the purpose of predicting natural ga...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2017-03-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854017300761 |
| _version_ | 1797287704884412416 |
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| author | Guang Yang Guohui Li Nan Li Shuangling Chen Hua Wang Liang Xu |
| author_facet | Guang Yang Guohui Li Nan Li Shuangling Chen Hua Wang Liang Xu |
| author_sort | Guang Yang |
| collection | DOAJ |
| description | The Sichuan Basin represents the earliest area where natural gas is explored, developed and comprehensively utilized in China. After over 50 years of oil and gas exploration, oil and gas reservoirs have been discovered in 24 gas-dominant layers in this basin. For the purpose of predicting natural gas exploration direction and target of each layer in the Sichuan Basin, the sedimentary characteristics of marine and continental strata in this basin were summarized and the forms of multi-cycled tectonic movement and their controlling effect on sedimentation, diagenesis and hydrocarbon accumulation were analyzed. Based on the analysis, the following characteristics were identified. First, the Sichuan Basin has experienced the transformation from marine sedimentation to continental sedimentation since the Sinian with the former being dominant. Second, multiple source–reservoir assemblages are formed based on multi-rhythmed deposition, and multi-layered reservoir hydrocarbon accumulation characteristics are vertically presented. And third, multi-cycled tectonic movement appears in many forms and has a significant controlling effect on sedimentation, diagenesis and hydrocarbon accumulation. Then, oil and gas reservoir characteristics and enrichment laws were investigated. It is indicated that the Sichuan Basin is characterized by coexistence of conventional and unconventional oil and gas reservoirs, multi-layered reservoir hydrocarbon supply, multiple reservoir types, multiple trap types, multi-staged hydrocarbon accumulation and multiple hydrocarbon accumulation models. Besides, its natural gas enrichment is affected by hydrocarbon source intensity, large paleo-uplift, favorable sedimentary facies belt, sedimentary–structural discontinuity plane and structural fracture development. Finally, the natural gas exploration and research targets of each layer in the Sichuan Basin were predicted according to the basic petroleum geologic conditions, enrichment laws and exploration status. |
| first_indexed | 2024-03-07T18:38:19Z |
| format | Article |
| id | doaj.art-5526b95061d64374a1cb53b33d04aa09 |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T18:38:19Z |
| publishDate | 2017-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj.art-5526b95061d64374a1cb53b33d04aa092024-03-02T04:41:27ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402017-03-0142819010.1016/j.ngib.2017.07.012Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan BasinGuang YangGuohui LiNan LiShuangling ChenHua WangLiang XuThe Sichuan Basin represents the earliest area where natural gas is explored, developed and comprehensively utilized in China. After over 50 years of oil and gas exploration, oil and gas reservoirs have been discovered in 24 gas-dominant layers in this basin. For the purpose of predicting natural gas exploration direction and target of each layer in the Sichuan Basin, the sedimentary characteristics of marine and continental strata in this basin were summarized and the forms of multi-cycled tectonic movement and their controlling effect on sedimentation, diagenesis and hydrocarbon accumulation were analyzed. Based on the analysis, the following characteristics were identified. First, the Sichuan Basin has experienced the transformation from marine sedimentation to continental sedimentation since the Sinian with the former being dominant. Second, multiple source–reservoir assemblages are formed based on multi-rhythmed deposition, and multi-layered reservoir hydrocarbon accumulation characteristics are vertically presented. And third, multi-cycled tectonic movement appears in many forms and has a significant controlling effect on sedimentation, diagenesis and hydrocarbon accumulation. Then, oil and gas reservoir characteristics and enrichment laws were investigated. It is indicated that the Sichuan Basin is characterized by coexistence of conventional and unconventional oil and gas reservoirs, multi-layered reservoir hydrocarbon supply, multiple reservoir types, multiple trap types, multi-staged hydrocarbon accumulation and multiple hydrocarbon accumulation models. Besides, its natural gas enrichment is affected by hydrocarbon source intensity, large paleo-uplift, favorable sedimentary facies belt, sedimentary–structural discontinuity plane and structural fracture development. Finally, the natural gas exploration and research targets of each layer in the Sichuan Basin were predicted according to the basic petroleum geologic conditions, enrichment laws and exploration status.http://www.sciencedirect.com/science/article/pii/S2352854017300761Sichuan BasinSedimentary characteristicsStructural evolutionMulti-layerNatural gasHydrocarbon accumulation characteristicsEnrichment lawsExploration domains |
| spellingShingle | Guang Yang Guohui Li Nan Li Shuangling Chen Hua Wang Liang Xu Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin Natural Gas Industry B Sichuan Basin Sedimentary characteristics Structural evolution Multi-layer Natural gas Hydrocarbon accumulation characteristics Enrichment laws Exploration domains |
| title | Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin |
| title_full | Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin |
| title_fullStr | Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin |
| title_full_unstemmed | Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin |
| title_short | Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin |
| title_sort | hydrocarbon accumulation characteristics and enrichment laws of multi layered reservoirs in the sichuan basin |
| topic | Sichuan Basin Sedimentary characteristics Structural evolution Multi-layer Natural gas Hydrocarbon accumulation characteristics Enrichment laws Exploration domains |
| url | http://www.sciencedirect.com/science/article/pii/S2352854017300761 |
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